Dermatology Flashcards
Fitzpatrick Skin Types
Fitzpatrick Skin Types
- White
- Never tans - White
- Usually burns - White
- Sometimes burns - Moderate brown
- Rarely burns - Dark brown
- Very rarely burns - Black
- Does not burn
Dermatology
- Family histories
Dermatology FHx
- Skin disease
- Atopy
- Autoimmune
Dermatology
- SHx
Dermatology SHx
- Occupation
- Sun exposure
- Contactants - Improvement when away from work
Dermatology History
- Drug Hx
Dermatology DHx
- Regular/recent
- Systemic/topical
- Where
- How much
- How long
Dermatology exam
- SCAM
Dermatology SCAM
S - ite
C - colour
A - ssociated changes
M - orphology
Dermatology
- ABCD
Dermatology ABCD
A - ssymetry
B - order
C - olour
D - iameter
Atopic Eczema
- Mx
Atopic Eczema - Mx
- Irritiant Avoidance
- Soap/detergents, oveheating/rough clothing
- Infections, pets, pollen, HDM, stress - Emollients
- Topical CSTs
- Daily
- Face more mild than body - Antihistamines
- Pruritus
Suspected Melanoma
- Mx
Suspected Melanoma
- Refer on urgent pathway if:
- > 3 points
- 2 points for major: Size/shape/colour change irregularity
- 1 point for minor: 7mm/inflammation/oozing/sensation change - Suspected nodular melanoma
- Dermoscopy is suggestive
Eczema
- Emmolients
- Role
- Ingredients
- Escalation
Emmolients
- Medical moisturisers
- Fats
- eg. paraffin
- and water - Additional antimicrobials
- Rehydrates skin
- re-establishes lipid layer - Lotions-> creams -> ointments
Eczema
- Emolient use
- Dosing
- Timing
- Dispenser
- Risks
- Terminating
Eczema
- Emolient use
- Liberal and frequent
- BD-QDS - After washing to trap moisture
- Pump dispensers
- Avoid bacteria - Paraffin is flammable
- Continue after flare
Eczema steroids
- Escalation
Eczema steroids
- Escalataion
- Hydrocortisone
- Euvomate
- Clobetasone butyrate - Betnovate
- Betamethasone valerate - Dermovate
- Clobetalsol propionate
Eczema
- Sleep disturbance Mx
Eczema Sleep disturbance
- Antihistamines
Topical steroids
- Local SEs
Topical CSTs
- Local SEs
- Skin atrophy
- Telangiectasia
- Striae
- Acne
- Perioral dermatitis
- Allergic contact dermatitis
- Exacerbate skin infections
Topical steroids
- Systemic SEs (PO)
Steroid systemic SEs
- Cushing’s
- Immunosuppression
- HTN
- DM
- OP
- Cataracts
- Steroid-induced psychosis
- Fluid retention
Topical steroids
- Patient-friendly dosing
Topical steroids
- Patient-friendly dosing
- Finger Tip Units
- Eg.
- Face and neck - 2.5 FTUs
- Arm -3FTUs
- Leg - 6FTUs
- Trunk - 7FTUs
Eczema
- Maintenance mx
Eczema
- Maintenance mx
- Emollients
- Low-potency steroids
- Dressings
- Dry/medicated bandages
- Wet wraps (not for wet eczema)
Eczema
- Frequent flare-up management
Eczema
- Frequent flare-up management
- Check compliance
- Steroid weekend regime
- Weekly 2/7 of potent steroids - Consider alternatives
- eg. Protopic (Tacrolimus) - Skin swab/nasal swabs
- Bactroban if staph positive - Consider allergic dermatitis
- Immunomoddulators
- eg. Protopic (Tacrolimus)
Topical Calcineurin Inhibitors
- 2 Drugs
- 2 Uses
- 3 SEs
Topical Calcineurin Inhibitors
- Examples
1. Protopic (tacrolimus ointment)
2. Elidel (pimecrolimus cream) - Use
1. Atopic dermatitis
2. Preventing flare-ups - SEs
1. Local skin irritation
2. Area risk of HSV
3. Worsens acute infections
Scalp eczema
- Tx
Scalp eczema tx
- Tar-based shampoo
- <18mo, emollient bath oil - Topical steroids (water-based scalp application)
- Betacap
- Sebco ointment for scale removal
Dermatology
- Use of methotrexate
- Uses
- Dosing
- SEs
Dermatology - methotrexate
- 2 Uses
1. Psorisis
2. Eczema - Dosing
1. PO/SC
2. Folic acid - separate day! - SEs
1. GI upset
2. Mouth ulcers
- Fatigue/anaemia
- Liver
- Lung fibrosis
- BM suppression - screen for infections/live vaccines
- Teratogenic - contraception (male and female!)
- Interactions
- Trimethoprim
Methotrexate
- Initiating
- Monitoring
Methotrexate
- Initiating
1. Pregnancy test
2. FBC
3. U&E/LFT - Monitoring (2-3 months)
- FBC
- U&E
- LFTs
Azathioprine
- Dermatology
- Uses
- SEs
- Screening/monitoring
Azathioprine
- Dermatology
- Uses
1. Atopic eczema - SEs
1. BM suppression
2. Allergic reaction
3. GI upset
4. Prolonged use - Skin cancer
- Lymphoma
- Screening/monitoring
1. TPMT test
2. Monitor FBC,LFT,U&E
3. Avoid live vaccines
Ciclosporin
- Dermatology
- Uses
- SEs
- Monitoring
Ciclosporin
- Dermatology
- Uses
1.Psoriasis
2. Atopic eczema - SEs
1. Gingival hyperplasia
2. GI Upset
3. Fatigue
- Tremor
- Excessive hair growth
- Monitoring
1. No live vaccines
2. No prgenancies
3. No breast feeding
4. Drug interactions
Comedonal acne
- First line
- SEs
Comedonal acne
- Mx
1st line — Topical retinoid
- Adapelene
- Isotretinoin
+ Benzoyl peroxide - Avoid in pregnancy
- Dries skin and irritates
Papular/pustular acne
- Mx
Papular/pustular acne
- Mx
Combination
- Epiduo
(adapelene +BPO) - Duac
(clindamycin +BPO)
Refractive acne
- Mx
Refractive acne Mx
- Systemic ABx
- Tetracycline
- Not in children or pregnancy - Macrolides
- Erythromycin/clarythromycin - Trimethoprim
- Used in young children
- Some bacterial resistance - Primary care
- Stop oral ABx after 3mo
- See dermatologit
Female: Moderate-severe acne
- GP Mx
- ADRs
Female acne - moderate-severe
- Dianette
- Cyproterone acetate
+ ethinyloestradiol - Increased risk of VTE
- CI’d in FHx of VTE
- CI’d in past VTE
- Not indicated as sole OCP
Acne
- Referal criteria
Acne
- Referal criteria
- Severe acne
- Moderate acne
- Partially responsive
- Scarring
- Hyperpigmentation - Psychological symptoms
Retinoids
- ADRs
Retinoids
- ADRs
- Dry skin/dry lips/ dry eyes
- Fragile skin
- Avoid waxing - Increased infection risk
- Slower healing
- Increased sun sensitivity
- LFT derangement
- Cholesterol and tri-glycerides - Myalgia/arthralgia
- Depression/DSH/Suicide
- Teratogenic
- Acitretin (3 years)
Psoriasis
- Mx
Psoriasis Mx
- Consider co-morbidities
1. Psoriatic arthritis - Rheumatology referral
2. CVD - Drugs
1. Emollients - Reduce scale
2. Flare-ups - Vitamin D
eg. Dovobet/Enstilar foam 8-12/52 - Moderate steroid eg. Eumovate 1-2/52
Psoriasis
- Vitamin D analogues
- Names
- Role
- SEs
Psoriasis Vitamin D analogues
- Drugs
1. Calcipotriol
2. Tacalitol
3. Calcitriol - Role
1. Regulate immune system
2. Slow overgrowth - SEs
1. Irritate sensative areas
2. Hypercalcaemia
3. Not recommended during preganancy.breast feeding
Psoriasis
- 2nd line referral
Psoriasis second line
- Phototherapy
- Acitretionin
- Methotrexate
- Ciclosporin
- PD4 inhibitor
- Apremilast - Dimethyl fumerate
Psoriasis
- Phototherapy
- Timing
- Types
Psoriasis Phototherapy
- Timing
1. Twice weekly
2. 15-30 treatments - Types
1. Narrowband UVB - Severe psoriasis and eczema
- PUVA (deeper reaching)
- Psorelan +UVA
- Psoriasis, vitiligo, cutaneous T-cell lymphoma
Dermatology Phototherapy
- ADRs
Dermatology Phototherapy
- ADRs
- Redness/discomfort
- Dry and itchy
- Folliculitis
- Poly-morphic light erruption (rash)
- Cold sores
- Worsening of skin disease
- Nausea
- From PUVA psoralen - Premature aging/skin cancer
Dermatology
- Apremilast
- Mechanism
- ADRs
Dermatology - Apremilast
- Mechanism
1. PDE4 i (Phosophodiesterase 4 i)
2. Skin inflammatory processes - ADRs
1. GI upset
2. Headache/insomnia
3. Tiredness/muscle pain
4. Resp infections
- Avoid pregnancy/live vaccines
Dermatology
- Dimethyl fumerate (fumaric acid)
- Mechanism
- SEs
Dimethyl fumerate (fumaric acid)
- Mechanism
1. FAE acts on immune system - SEs
- GI upset
- Headache
- Flushing
- Monitor LFT, U&E, urine dip, FBC
- Leukoencephalopathy - Avoid pregnancy/breastfeeding
Psoriasis
- Biologics
- Use
- Names
- SEs
Psoriasis Biologics
-Use
1. Methotrexate and ciclosporin no effect/tolerated
2. Large impact disease
- Drugs
1. Ustekinumab
2. Adalimumab
3. Secukinumab
- Infliximab
- SEs
- TB/Hep BC/HIV/ VZV screen
- No live vaccines
Scalp psoriasis
- Mx
Scalp psoriasis
- Mx
- Potent CSTs
- Betacap 4 weeks - Descaling
- Diprosalic - Potent CTs with Calcipotriol
- Dovobet 4 weeks - Very potent CST
- Etrivex shampoo 4 weeks
- Sebco scalp ointment OD/BD
Venous ulcer
1. Sx
2. Mx
Venous ulcer
- Sx
1. Well defined, below knee
2. Brown edges, granulation tissue
3. Itchy - Mx
1. Compression stockings - Check ABPI with doppler
Nail dystrophy
- Causes
Nail dystrophy
- Causes
- Melanoma
- Trauma
- Fungal infection
- Psoriasis
Melanoma
- Prognostication
Melanoma
- Prognostication
- Breslow thickness
Tinea pedis
- common organism
- Treatment
Tinea pedis
- common organism
Trichophyton rubrum - Treatment
Fluconazole
Perioral dermatitis
- Distribution
- Treatment
Perioral dermatitis
- Distribution
1. Tiny blisters - red, itchy
- tingle, burn
2. Muzzle area
(Triggered by steroids) - Treatment
1. Stop using cleanses/steroids
2. Non steroids - Elidel cream (Pimecrolimus)
- Minocycline
SCC
- Poor prognosis sites
SCC
- Poor prognosis sites
- Lips
- Ears
- Eyes
Bullous pemphigoid
- Blisters
- Treatment
Bullous pemphigoid
- Blisters
Tense
Some empty - Treatment
0. Autoimmune condition
1. Topical Steroids (Dermovate)
2. Doxycycline
3. Prednisolone (0.5mg/kg) - until no new blisters
High dose steroids
- protection
High dose steroids
- protection
- PPI
- Steroid card
- COVID warning - Bone protection
Psoriasis
- appearance
- treatment
Psoriasis
- appearance
0. Demarcated scaly plaques
1. Extensors
2. Ears
3. Scalp
4. Natal cleft
5. Nail pitting - treatment
1. Retinoids
Lesions
- 5 Ss
Lesions
- 6 Ss
1 Site
2 Shape
3 Size
4 Shade
5 Surface
6 Surrounding skin
Acne
- Combination gels
Acne
- Combination gels
- Duac
- BP
- Clindamycin - Epiduo
- BP
- Adapalene (retinoid)
Roaccutane
- ADRs
Roaccutane (Isotretinoin)
- ADRs
- Dry eyes, skin, nose
- Thin and breakable - Sore throat/mouth
- Headaches
- Teratogenic
- COCP - Low mood
Eczema
- Mx ladder
Eczema
- Mx ladder
- Emollients
- Topical csts
(mild, mod, potent) - Topical calc. i.
- Tacrolimus/pimecrolimus - Bandages
- Phototherapy
- Oral CSTs
Psoriasis
- Common Types
Psoriasis
- Types
- Plaque
- psoriasis vulgaris - Scalp psoriasis
- Nail psoriasis
- Guttate psoriasis
- <1cm on trunk, limbs scalp
- Post strep - Inverse psoriasis
- flexural
Psoriasis
- Four less common types
Psoriasis
- Four less common types
- Pustular psoriasis
- Generalised pustular psoriasis
- Von Zumbusch psoriasis - Palmoplantar pustulosis
- Erythrodermic psoriasis
- Nearly all the skin
Lentigo maligna
- Features
- Tx
Lentigo maligna
- Features
1. Slow growing brown patch
2. Evolves into melanoma
3. Commonly on the face
4. Commonly on older people
Nodular melanoma
- Mx
Nodular melanoma
- Mx
Stage 0
- Consider Imiquimod
- 0.5cm margin excision
- Repeat bipsy
Stage 1
- 2cm margin excision (1 if disfiguring)
Stage 2
- 2cm margin excision
Stage 3
- Excision
- Adjuvant chemo
- No adjuvant radio unless risk outweighs harms
Stage 4
- MDT
- Surgery/ablation
- Brain surgery/radio
- Consider chemo/immnotherapy
(Nivolumab/ipilimumab)
Acral melanoma
- Features
Acral melanoma
- Features
- Palms, soles, fingernails/toenails
- Common in darker skin
Sub-ungal haematoma
- Features
- Mx
Sub-ungal haematoma
- Features
1. Pseudo hutchinson’s sign
2. Subungal blood - Mx
1. Follow up
Benign longitudinal melanonychia
- Features
- Mx
Benign longitudinal melanonychia
- Features
1. Thin
2. Multiple - Mx
1. Biopsy to r/o melanoma
Classic seborrheic keratoses
- Features
- Mx
Classic seborrheic keratoses
- Features
1. Brown ‘warty’ appearance - comedo-like openings
2. Milea-like cysts
3. Older person
4. Multiple similar lesions
5. Rough to touch
Non-melanoma skin cancer
- Two pre-malignant conditions
Non-melanoma skin cancer
- Pre-malignant conditions
- Actinic keratosis
- Bowen’s disease
- Pink patch
- Full thickness dysplasia
- In situ SCC
BCC
- Appearance
- Growth
- Ex
BCC
- Appearance
1. ‘Rodent ulcer’
2. Rolled pearly margin
- Translucent stroma production
- Well defined blood vessels
3. Morphoeic BCC
- indistinct edges
4. Superficial BCC
- Pink patch
- Similar to Bowen’s disease
5. Pigmented BCC
- Grey ‘bean-like’ structure
6. Slow growing
- Growth
1. Destruction
2. Can wrap around nerve - death from brain metastasis
- Ex
1. Good lighting and remove crust
MOHS
- Sites
- Process
MOHS
- Sites
1. Sensitive
2. Narrow margin - Process
1. LA
2. Horizonal cut
3. Frozen section
4. Margins - peripheral and deep
Picker’s Nodule
- Features
- Mx
Picker’s Nodule
- Features
- Intensely itchy
- Mx
1. Psychiatry
2.
Dermatofibroma
- Features
- Mx
Dermatofibroma
- Features
1. May mimic bcc, scc, melanoma
2. Firm nodules
3. Dimple sign - Pinch - and see dimple in the middle
- Mx
1. Observe